They hold trademarks on the word twitter and tweet.
So neither of those are safe as it relates to:
Word Mark TWEET
Goods and Services IC 038. US 100 101 104. G & S: Telecommunication services; telecommunications services, namely, providing online and telecommunication facilities for real-time interaction between and among users of computers, mobile and handheld computers, and wired and wireless communication devices; enabling individuals to send and receive messages via email, instant messaging or a website on the internet in the field of general interest; providing on-line chat rooms and electronic bulletin boards for transmission of messages among users in the field of general interest; providing an online community forum for users to share information, photos, audio and video content about themselves, their likes and dislikes and daily activities, to get feedback from their peers, to form virtual communities, and to engage in social networking
IC 041. US 100 101 107. G & S: Providing on-line journals, namely, blogs featuring user-defined content
IC 045. US 100 101. G & S: Online social networking services; providing a website on the internet for the purpose of social networking; providing on-line computer databases and on-line searchable databases in the field of social networking
Standard Characters Claimed
Mark Drawing Code (4) STANDARD CHARACTER MARK
Serial Number 77715815
Filing Date April 16, 2009
Current Filing Basis 1B
Original Filing Basis 1B
Owner (APPLICANT) Twitter, Inc. CORPORATION DELAWARE 539 Bryant Street., Suite 402 San Francisco CALIFORNIA 94107
Attorney of Record Karen A. Webb
Type of Mark SERVICE MARK
Register PRINCIPAL
Live/Dead Indicator LIVE